Forum Moderators: open
Your articles seem quite small. I usually write articles that range from 700 words up to 1200 or more. You might think of adding more to your articles. You also might think of varying your article sizes.
Remember, search engines like content. They feed on it and they especially like it if it's unique.
Well...good luck!
frenzy77
But if I were only thinking about the SE's, I like frenzy77's answer. Remember that nearly half of all searches are completely unique in a given year (no other person searched on that exact same phrase). Those are typically "long tail searches" and pages with greater amounts of content have a better chance at picking up those unique, long tail searches.